Oil-pumping apparatus for gas-machines.



M. LAUX.

OIL PUMPING APPARATUS FOR GAS MACHINES.

APPLICATION FILED 1113.28, 191s.

l 091 35'?. Patented Ma1124, 1914 NTTED STATES PATENT OFFICE.

MATI-IIAS LAUX, OF ST. LOUIS, MISSOURI, ASSIGNOR T0 AERO-GAS MACHINE COM- PANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MAINE.

OIL-PUMPING APPARATUS FOR GAS-MACHINES.

T 0 all whom t may concern Be it known that I, MA'rrnns LAUX, a citi` zen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Oil-Pumping Apparatus for Gas-Machines, of which the following' is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to gas machines, and particularly to the pumps used in such machines for supplying the hydro-carbon oil to the carbureter of the machine.

A great deal of trouble has been experi enced with the pumps that have heretofore been used in gas machines for pumping the hydro-carbon oil to the carbureter on account of the fact that capillary attraction caused the hydro-carbon oil on one side of the piston to escape to the opposite side of the piston through the pores of the material. used to pack the piston. Gas machine pumps are usually buried in the ground or are arranged in a small underground compartment and unless the pump can be taken apart and assembled easily it is a difficult task to clean the pump.

Unc object of my prese-nt invention is to provide a practicable pump of simple construction which is so designed that the hydro-carbon oil will not leak around the piston of the pump when the pump is in operation.

Another object is to provide a pump and also a strainer which are so designed that they can be taken apart and assembled easily by an operator standing some distance from the point. where the pump and strainer are installed, thus permitting the pump and strainer to be cleaned easily when they are buried in the ground or installed in an underground compartment. And still another object is to provide a hydro-carbon oil-pumping apparatus that is efficient and not liable to get out of order and which can be manufactured at a low cost.

Other objects and desirablefeatures of my invention will be hereinafter pointed out.

Figure l of the drawings is a side elevational view of a pumping apparatus constructed in accordance with my invention; Fig. 2 is an enlarged vert-ical sectional view of the pump and the strainer; and Fig. 3

Specification of Letters Patent.

Application filed February 28, 1913.

Patented Mar. 24, 1914.

Serial No. 751,211.

is a vertical sectional view illustrating a pump of slightly different construction from the pump shown in Fig. 2.

Referring to the drawings which illus trate the preferred form of my invention7 A designates a carbureter of any preferred type to which hydro-carbon oil is supplied by means of a pump B provided with a piston rod 1 that is operatively connected to a lever 2 which is moved intermittently by a cam wheel 3 on a shaft Ll; that is driven by some suitable means, not shownj the piston rod l being preferably provided with a pin that enters an elongated slot 2a in the lever 2, and said lever being provided with a roller 2b that cooperates with the cam wheel 3. The hydro-carbon oil is contained in a tank C that is preferably buried under the ground, and a feed-pipe 5 leads from the lower end of the tank C to a strainer D that will hereinafter be described, said strainer being connected with the cylinder of the pump B by means of a pipe 6, and the pump and strainer being arranged in such a position Vwith relation to the tank C that the hydrocarbon oil will be supplied to the pump by gravity.

rThe pump B comprises a cylinder arranged below the pipe G through which the hydrocarbon oilV is supplied to the pump, and the piston S which is arranged inside of said cylinder is connected to the lower end of the piston rod l by means of a universal joint which is preferably formed by means of a transversely disposed pin 9 in the piston 8 that passes through an opening 10 in the piston rod whose end portions are flared, as shown in Fig. 2, thereby preventing the piston or the piston rod from binding in case they are not in direct alinement with each other. An opening 11 that is formed in the piston 8 establishes communication between the opposite endsV of the cylinder of the pump and permits the hydro-carbon oil to flow from the top side to the bottom side of the piston when the piston is moved upwardly. iVhen the piston 8 moves downwardly a ball checkwalve 12 in the lower end of the piston automatically closes the port 11 and thus causes the oil on the under side of the piston to be forced out of the lower end of the cylinder through the pipe 13 that leads to the carbureter, as shown in Fig. l, the seat for said ball check-valve consisting of a tapered recess 14 that is l packing rings of porous or fibrous material as has heretofore been the usual practice in hydro-carbon oil pumps, 1 form one or more annular undercut grooves 17 in the outer surface of the piston 8, said grooves being tapered in cross section and inclined upwardly toward the top of the piston. Consequently, when the piston moves downwardly the oil that leaks upwardly around the piston flows into the bottom annular groove 17, and in View of the fact that said groove is undercut or is tapered upwardly toward the top of the piston the downwardly inclined top wall of said groove overcomes any tendency of the oil to escape from the groove and pass upwardly around the piston. 1 have found in practice that a single annular groove 17 of the cross sectional shape shown in Fig. 2 makes the pump practicable and eliicient for pumping hydrocarbon oil, but, if desired, a second tapered or annular undercut groove 17 can be formed higher up on the piston so as to absolutely eliminate the possibility of the oil escaping to the top side of the piston in case some oil should get by the lower groove 17.

The strainer D that is arranged between the oil-supply pipe 5 and the pipe 6 through which the oil is admitted to the cylinder of the pump B, consists of a tubular-shaped chamber in which a horizontally disposed disk 18 of porous material is arranged at a point between the pipes 5 and 6, as shown in Fig. 2, so as to filter the oil before it is admitted to the pump cylinder. The filter- `ing disk 18 may be formed in various ways but I prefer to form it from a layer of some suitable ltering material and two perforated disks arranged on opposite sides of said material and clamp said disks to a rod 19 provided at its lower end with a cut 20 for collecting the sediment that is strained out of the oil.

1n order that the pump and strainer may be cleaned easily when they are buried under the ground or arranged in an underground compartment, as shown in Fig. 1, 1 provide the pump-cylinder with a long extension 7a which preferably projects upwardly through the floor on which the carbureter A is mounted, the cylinder of the filtering device D also being provided with a tubular-shaped eXtension 21 that also projects upwardly through said iioor,thereby enabling both the pump and the filtering device to be cleaned without removing them from their compartment. The upper end of the tubular-shaped extension 21 of the ltering device is normally closed by a cap 22, and the rod 19 to which the filtering disk is connected, is preferably secured to said cap so that after the cap has been removed the filtering disk 18 can be drawn upwardly out of the member in which it is normally arranged. The extension 7a of the pump cylinder is preferably of greater diameter than the main portion 7 of the cylinder in which the piston operates so as to permit the piston to be withdrawn easily when it is desired to clean the pump, and the tubular-shaped member 21 of the strainer or filtering device is also preferably of greater diameter' than the part 28 in which the filtering disk 18 is normally arranged so as to facilitate the removal of said disk.

Both the pump and the straining device can be formed principally from ordinary pipe-fittings, and in Fig. 2 1 have illustrated' a pump and straining device constructed in this manner. The lower end of the pump cylinder is formed by a coupling 211 into which a plug 25 is screwed, and the upper end of the cylinder is connected to the eX- tension 7 a by means of a reducing T 26 into which the pipe 6 is screwed. rlhe pipe 13 is tapped into one side of the coupling 2st and said pipe is provided with a check-valve 13a. A piece of common pipe may be used to form the extension 7a as it is not necessary for the inner surface of the extension 7 a to be perfectly smooth and cylindrical. The strainer or filtering device D comprises two Ts, 27 and 28, into which nipples 29 and 30 are screwed7 the nipple 29 being provided at its lower end with a cap 31 and the tubularshaped member 21 being screwed into the upper end of the nipple 28. The tubularshaped member 23 in which the filtering disk 18 is normally arranged, preferably consists of a bushing of brass or other suitable material that is arranged inside of the nipple 30.

The pump illustrated in Fig. 8 is of substantially the same construction as the one shown in Fig. 2 except that two pieces of pipe of the same diameter are used to form the cylinder 87 and the extension 87a of the cylinder, said pieces of pipe being connected together by a T 88, and the pipe 37 being provided with a bushing 39 of brass or some other suitable material.

An apparatus of the construction abovedescribed is very efficient for pumping hydro-carbon oil to the carbureter owing to the fact that the piston of the pump is not provided with a packing through which the oil can seep, due to capillary attraction. rl`he piston and the piston rod of the pump are connected together in such a manner that neither of said elements will bind when they are not in accurate alinement; any dirt or foreign matter in the oil will be removed by the filtering device D before the oil enters the cylinder of the pump; the ball checkvalve in the pump is always sure to seat and thus prevent the oil from escaping from the under side of the piston to the upper side when the piston is moving downwardly on its power stroke; and in view of the fact that the pump and straining device can be taken apart by an operator standing on the floor under which the pump and straining device are arranged, said elements can be cleaned easily.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A hydro-carbon oil pump, comprising a cylinder and a piston in said cylinder provided on its outer surface with an annular groove which tapers upwardly toward the top of the piston.

A hydro-carbon oil pump, comprising a cylinder and a piston in said cylinder provided in its outer surface with an undercut annular groove whose top wall inclines outwardlv and downwardly.

An apparatus for pumping hydro-carbon oil to a carbureter, comprising a pump, a supply tank for containing the oil, a gravity feed-pipe leading from said supply tank, and a strainer or filtering device arranged between said supply pipe and the inlet of the pump.

4. An apparatus for pumping hydro-carbon oil to a carbureter, comprising a pump, a supply tank for containing the oil, a gravity feed-pipe leading from said supply tank, a strainer or iiltering device arranged between said supply pipe and the inlet of the pump, said filtering device comprising a cup or receptacle for receiving the dirt and foreign matter that is strained from the oil.

An apparatus for pumping hydro-carbon oil to a carbureter, comprising a gravity-fed pump which positively forces the oil to the carbureter from the piston when the pump moves in one direction, and a straining device arranged between the inlet of the pump and the source of oil supply, said straining device comprising a removable filter and a removable cup for collecting the sediment that is strained from the oil.

G. A pumping apparatus for gas machines, comprising a pump and a straining device, both of which are adapted to be buried under ground or arranged in an uncler-ground compartment, the cylinder of the pump being provided with an extension that terminates above the ground and the straining device also being provided with a tubularshaped member that terminates above the ground, thereby enabling the pump and the straining device to be cleaned easily.

7. A hydro-carbon oil pumping apparatus for gas machines comprising a pump whose cylinder has a long extension, a straining device comprising a tubular-shaped member through which the oil flows before it enters the pump cylinder, said tubular-shaped member having a long extension, a filtering disk in said member, a cup for collecting the sediment that is strained from the oil, and a removable rod to which said cup and disk are connected so as to enable the straining device to be cleaned easily.

8. A hydro-carbon oil-pumping apparatus for gas machines, comprising a pump cylinder, a tubular-shaped filtering device connected by means of a pipe with the upper end of said cylinder, a removable filtering disk, and a sediment-collecting cup arranged in said filtering device, a piston in said pump cylinder provided with a longitudinally-disposed o-peningthat extends through the piston, and a ball check-valve for closing said opening on the downward stroke of the piston.

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this 22nd day of February 1913.

MATHIAS LAUX.

Vitnesses:

VELJJS L. CHURCH, GEORGE llnnwnnn.V

@opzien of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

